oh well, I saw someone posted about this in facebook and I am interested to try. You must have known the crest (symbol) of, for example, Nobunaga family. There's a website to generate your family crest HERE.

The website is in Japanese, so if you don't know what is the meaning, you can use google translator (although it's not always correct lol).

I tried to enter my real name and date of birth, aaaaaand the result is:

I don't know what is the meaning of this symbol, but I SAW CATS! *v*I love cats so much! XD is this a fate? (no! wwwww)